1. Data Monetization & Personalization (Node.js, Redis, PostgreSQL): The backend uses Node.js for handling user interactions, while Redis is used for caching frequently accessed data to improve response times. PostgreSQL is employed for storing user preferences and shopping behavior, which powers the personalized deal recommendations and data monetization features.

2. Real-Time Offers & Notifications (Socket.io, MongoDB): Socket.io is integrated to enable real-time push notifications, keeping users informed about new deals and offers. MongoDB manages the dynamic storage of deals and user interaction data, providing scalability for growing datasets related to user activities and offers.

3. Frontend & User Experience (React Native, AWS S3): The frontend is built with React Native for a seamless cross-platform user experience. AWS S3 stores images, promotional content, and other media, ensuring quick load times and a responsive user interface as users interact with the app in real-time.